MAPS.ME uses data from OpenStreetMap, meaning the data retrieved from that service is a community-based map. Anyone can freely edit and contribute to the map, a map concept that is similar to Wikipedia.

The use of OSM also has the drawback of many places not getting the attention needed for updates. Depending on the geographic location OSM may have the most detailed maps or the most bare/outdated map.

OSM provides a map editable by everyone; just like the web-based encyclopedia, Wikipedia. Using a community edited map allows one to correct isses they encounter. Combined with the monthly turn around, these edits are added for navigation quickly.

It can take some time for an area to be rendered. This tends not to be a problem during navigation since only a small area must be rendered as the map moves, and this area isn't immediately needed; though likely a bigger issue with smaller screens.

Map downloads are huge in size, ranging from a few hundred megabytes, to a couple of gigabytes, depending on the size of the map being downloaded. Luckily, the app can be set to store them on external SD memory.

Offline access has been updated to include search and directions in areas that have been downloaded for offline access. The biggest size for any single offline area is 120,000 square kilometers, however, multiple areas can be saved. Offline access isn't available in some regions, however.

It's not immediately apparent how to change the language of the maps (of if this is even possible). Thus, it can be troubling/useless if the maps are in the local script (e.g. Korean) and the directions or address someone is looking for is provided in romanized words (or vice versa).

GPS Navigation & Maps Sygic provides lane guidance as a feature for safe lane maneuvering while driving which is great especially when on a highway of unknown locations being one never knows exactly what lanes to be in when merging or taking exits.

Sygic's interface is tailored to navigation. While viewing maps in 2D is possible, it populates the map with a bunch of POI icons which detract from street names. The biggest issue is how easy it is to select something or start navigation when zooming in/out. Still usable for map viewing thoug...

Navmii GPS World (Navfree) has voice guided navigation for its maps, even offline so users do not need to mess around with the app while driving, which is safer than having to constantly look at ones device.

Navmii GPS World (Navfree) uses OSM (OpenStreetMap) data which means it stores the maps on local storage so the user can use the app offline with zero data usage. This is great for those that need to use a navigation app but will have no data connection.

Offline GPS will tell you when you have left your tour (and approximately what direction it is in), but cannot re-route without internet connection. Which can be inconvenient for those that deviate or get lost.

It is not possible to locate an address if the device is unable to receive external data. This really limits the use of this app as an offline navigator as there is no way to access an address when offline.

Users can download map packs for different regions along with points of interest to allow for easy navigation when in an area without data or using a device that does not have a cellular data connection such as a tablet.